Apparatus for electrochemical gas detection and measurement

Details Apparatus for electrochemical gas detection and measurement Apparatus for electrochemical gas detection and measurement

1977-05-16

1979-05-01

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204 1T, G01N 2746

Patent

active

041522338

ABSTRACT:
Method for the electrochemical detection of a gas and apparatus including a gas-contacting electrode, biased to a predetermined potential, a counter electrode and electrolyte between the electrodes. The electrochemical reaction between the sensed gas and the sensing electrode produces an electric current in a sensing circuit between the sensing electrode and the counter electrode. The sensitivity and stability of the device are maintained by including a conductive member in spaced relationship to the sensing electrode. In accordance with the method, the conductive member is biased to the same potential as the sensing electrode and is selected to have the same response to factors affecting the zero current as the sensing electrode. The conductive member is electrically connected to the sensing electrode so that their zero current outputs are continuously balanced.

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